Theodor friedrich bebgmann



(No Model.)

. T. P. BERGMANN.

.ASSAYING GLASS FOR TESTING WINE. v No. 397,961. I Patented Feb. 19, 1889.

NITED STATES PATENT OFFICE.

THEODOR FRIEDRICH BERGMANN, OF LILIENSTEIN, NEAR KUNIGSTEIN, SAXONY, GERMANY.

ASSAYING-G LASS FOR TESTING WINE.

SPECIFICATION forming part of Letters Patent No. 397,961, dated February 19, 1889.

Application filed October 10, 1888- Serial No. 287,721. (No model.)

To (ZZZ whom it may concern.-

Be it known that I, THEODOR FRIEDRICH BERGMANN, landlord, of Lilienstein, near Konigstein, a subject of the Emperor of Germany, residing at Lilienstein, in the Kingdom of Saxony, Germany, have invent-ed certain new and useful Improvements in Assaying- Glasses for Proving ine as to its Purity and Genuineness; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This apparatus easily serves the purpose of assaying wine as to its purity and genuineness.

Reference is to be had to the aczoznpany ing drawings, in which Figure 1 is a longitudinal section of my as saying-glass, the same being closed. Fig. 2 is a similar view of the same opened and inserted in a wine-glass, and Fig. 3 is a top view of the cap.

This apparatus consists of a glass tube, 1', on one end of which is secured a metal cap, it. The cap 7- is provided with a threaded stem, 3, through which passes a rod, (Z, which also passes to the lower end of the tube 2'.

To the upper outer end of the rod (Z is secured a button, a, and on the lower end of the rod is a cap, h, that is adapted to close the glass tube r at its lower end.

The cap 70 is provided with one or more holes, 0, which permit the escape of air from the glass tube, '1. On the upper side of the cap 7c is a rubber ring, g. A cover, m, screws on the stem 3 and covers over the holes, and rests on or carries the ring g, so as to close the openings 0. By raising the cover at the holes 0 are uncovered and air is permitted to escape from and enter the tube 1'. The rod dpasses through the cover 111. and has longitudinal movement therein. The cap 71 carries a rubber ring, g, which serves to tightly close the lower end of the glass tube -'r. f is a spring that surrounds the rod (1 and presses at one end against the button 11 and at its other end against the cover m. The upward pressure of the spring f moves the rod (1 upcontact with the tube r by pressing on the,

button 11, which lowers the rod (Z and cap 72. The apparatus is thereupon immersed in the wine to be assayed, as represented in Fig. 2. As soon as sufficient wine has entered the apparatus the same is closed below as well as above by the cap 71 and the cover on, and is taken out of the wine and thereupon passed into a glass containing clear water. The cap it is now moved from-the tube 7 to open the lower end of the same, while the holes 0 above are kept closed, whereby neither air nor water can enter the apparatus, nor wine from the apparatus can enter the water.

It the wine be adulterated or mixed, the coloring or other foreign matter mixed up with the same will dissolve by contact with the water and color it, as the wine is directly contacted with the water through the lower opening; but if the wine be pure and notadulterated the water keeps perfectly clear, as pure alcoholic liquids are lighter than water.

This apparatus can be made of any size wished for, so that the same may easily be carried in the pocket.

Having thus described my invention, what I claim is In an assayingglass for proving the purity and genuineness of wine, the tube 1', perforated cap is, carried by said tube and apertured, threaded stem 8, and the cover m, that is carried by the stem 8 and adapted to close the apertures in the cap, combined with the rod (Z, that passes through the cover m, cap it, and tube 0'', spring 3, button a, and cap 71, carried by the red (I, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

'IHEODOR FRIEDRICH BERGMANN.

lVitnesses:

CARL FR. REICHELT, PAUL DRUcKMiiLLER. 

